Nitroglycerin is used for what primary purpose in ischemic heart disease?

Nitroglycerin is used for what primary purpose in ischemic heart disease?

• A. Its a beta-blocker
• B. It is a diuretic
• C. Its a vasodilator that restores myocardial perfusion
• D. It is a calcium channel blocker

Answer: (C)

In ischemic heart disease, the goal is to improve the balance between oxygen supply and demand. Nitroglycerin does this by acting as a vasodilator that releases nitric oxide to relax vascular smooth muscle. Its main effect is venodilation, which lowers venous return to the heart (preload), reduces left ventricular end-diastolic pressure and wall stress, and thereby decreases myocardial oxygen consumption. This reduction in demand, along with any improvement in coronary blood flow, helps relieve angina and improve perfusion to ischemic areas. It is not a beta-blocker, a diuretic, or a calcium channel blocker, which is why the best description is that it is a vasodilator that restores myocardial perfusion.

In ischemic heart disease, the goal is to improve the balance between oxygen supply and demand. Nitroglycerin does this by acting as a vasodilator that releases nitric oxide to relax vascular smooth muscle. Its main effect is venodilation, which lowers venous return to the heart (preload), reduces left ventricular end-diastolic pressure and wall stress, and thereby decreases myocardial oxygen consumption. This reduction in demand, along with any improvement in coronary blood flow, helps relieve angina and improve perfusion to ischemic areas. It is not a beta-blocker, a diuretic, or a calcium channel blocker, which is why the best description is that it is a vasodilator that restores myocardial perfusion.